Pump



Feb- 28, l933- v J. s. ABERCROMBIE 1,899,297

PUMP

Filed Jan. l5, 1932 -lllll Patented Feb. 28,A 1933 UNITED STATES PATENT OFFICE :uns s; ABERCROMBIE, or Hoirsrro TEXAS, assIGNoR rro STEPHENS rUMr ooMrANY,

i OF BDUND ROCK, T

, A CORPORATION OF -DELAWARE PUMP Application led January 15, 1532.` Serial No. 586,908.-

A. This invention relates to pumps.

It has for its object the provision of a new and improved pumping-combination including a. pair of power means and a pump, the

construction and ,arrangement being'such that the power me-ans may be us'ed successively'. and simultaneously to operate the pump.

Other objects will hereinafter appear. The drawing illustrates a sectional elevation-of the preferred embodiment of the invention; the pump being shown in detail; the power means, ragmentarily.

The pump shown. is designed for pumping abrasive and corrosive fluids, and is particularl adapted for use as a mud or slush pump in eep well drilling operations. This general type of ump is shown by the patent to Charles D. vember 17, 1931.

It comprises a pair of substantially frustoconical barrels 1 and 2, which are spaced and axially aligned so that their base ends are ad'acent each other. The barrels 1 and 2 de 'ne, respectively, the pumped -fluid chambers 3 and 4.4 The barrel 1 has an intake valve 5, and an exhaust valve 6; the barrel 2, an intake valve 7 and an exhaust valve 8. The intake valves 5 and 7 permit entrance into the barrels of the pumped fluidfrom the common intake pipe 9; and prevent the escape of pumped uid from the barrels into said intake pipe. The exhaust valves 6 and 8 permit the expulsion of pumped fluid from the barrels7 into the common exhaust pipe 10; and prevent the passage of iluid into the barrels from said exhaust pipe. 'p i Mounted within and coextensve with the barrels 1 and 2- are the tubular, expansible .40 members 11 and 12, preferably made'of rubber. Eacho'f thesemembersll. and 12 has an lnternal ilange at one end and an lexternal flange at-the other connected and sealed'to the end walls of its chamber by the means shown.

The piston 13 is disposed between and extends int-o' the openings in the adjacent ends of the jspacedbarrels Land 2 and the open inner ends of the tubular members 11 and 12. When the piston is in the position shown by the drawing, the member 11 is expanded;

the member 12, in its normal cylindrical shape. When the piston is moved to the right, the member 12 is expanded by the actuating fluid displaced therein bv the piston, and the member 11 contracts when the piston is withdrawn therefrom. Upon expansion of member 12, the inlet valve 7 is closed; .the outlet valve 8, opened` and the pumped fluid in 'chamber 4 is forced through the exhaust pipe 10. Meanwhile, thel contraction of member 11 has closed outlet valve 6, opened inlet valve 5, and drawn a fresh charge of pumped fluid through thefinlet valve 5 into the chamber 3. l

A reverse operation occurs when the piston is moved back into the\position shown by the drawing. The tubular member 11 is eX- panded and the tubular member 12 contracted. Expansion of member 11 effects closure of inlet valve 5, opening of outlet4 valve 6, and the expulsion of fluid from chamber'3 through exhaust pipe 10. Contraction of member 12 effects closureof outlet valve 8,. opening of inlet valve 7, and suction of` tively, to the exterior of the pump. To prevent the escape of fluid from' the barrels about the piston rods, suitable packings indicatedV generallyat 16 and 17 are provided. The. outer end of the piston rod14 is detachably connected to a power means 18 by a couplingy 19. The outer end ofl pistonrod 15 is def tachably connected to a power means 20 by a coupling 21. r

'The barrels 1 and 2, piston 13, and rods 14 and'15, are axially aligned. The numerals 18 and' 2O indicate anysuitable power means; for example, conventional steam engines.

`When it is desired to repair power lmeans 18, the coupling 19 may be removed to disconnect the rod 14 therefrom, and the power means 20 may then be used to operate the pump. If the power means 20 is in need of repair, the coupling 21 may be removed to disconnect the rod 15 therefrom, and the pump may then be operated by the power means 18. Or the piston rod 14 may be connected to the power means 18, and the piston rod 15 to the power means 20, and the power means used simultaneously 'to supply greater power `to the pump.

i I claim:

1. The combination of a pair of powerv means; a pump between said power means and having a piston, and a pair of piston rods connected to and extending in opposite directions from said piston toward said power means; and coupling/s to operatively and detachably connect each of said power means to the rod adjacent thereto, so that said power means may be used successively and simultaneously to operate said pump.

2. The combination of a pair of power means; and a pump between said power means and having a pair of barrels, each of said barrels having inlet and outlet means; a reciprocable piston between and extending into each of said barrels; and a pair of piston rods connected to and extending in opposite directions from said piston through said barrcls to the exterior of said pump said barrels, piston and rods being in axial alignment, and each of said rods ybeing detachably connected to one of said power means.

3. The combination of a pair of power means; a pump between said power means and having a barrel; said'barrel having inlet and outlet means; a liollowexpansible member in said barrel; a piston to expand and contract said member to draw fluid into said barrel through said inlet means andto expel it from said barrelthroughsaid outlet means;

and a pair of piston rodspconnected to and extend ing in opposite directions from said piston to the said power means; and couplingsA tc separably and detachably connect each of said power means to the rods adjacent thereto so that said power means may be used successively and simultaneously to operate said Pump 4. The combination of a pair of power means; and a pump between said power means and having a ,pair of barrels; each of said4 barrels having inlet and'outlet means; a hollow expansible member in 'each of said barrels; a reciprocable piston between said barrels and extending' into each of said members Y to expand and contract said members to draw iiuid into said vbarrels through said inlet means and to' expel 1t from said barrels through said outlet means; and a air of means.

In testimony whereof, I hereunto affix my signature.

JAMES S. ABERCROMBIE. 

